It's always good hope that something good will come out of one's efforts but, when one's hope is much and things doesn't go as planned, the hope is shattered which will cause the person to start seeing things negatively.
Everything doesn't always work out the way we would like it to,even we hope, we also have to prepare our mind for failure as well, so that when it happens, it wouldn't have too much effect on us.
Preparing one's mind for any circumstances, yet waiting and hoping for the best. That's a great summation.